南京林业大学学报(自然科学版) ›› 2010, Vol. 34 ›› Issue (06): 57-60.doi: 10.3969/j.jssn.1000-2006.2010.06.013

• 研究论文 • 上一篇    下一篇

不同降雨条件下天然次生林水文过程动态分析

王小明1,周本智1,钟绍柱2,孔维健1,王刚1 , 徐升华3   

  1. 1.中国林业科学研究院亚热带林业研究所,浙江富阳311400;2. 浙江省富阳市水利局, 浙江富阳311400;3.浙江省富阳市林业局,浙江富阳311400
  • 出版日期:2010-12-27 发布日期:2010-12-27
  • 基金资助:
    收稿日期:2010-04-15修回日期:2010-08-23基金项目:“十一五”国家科技支撑计划(2006BAD03A1806);中央级公益性科研院所基本科研业务费专项资金项目 (CAFYBB2008006;RISF060701)作者简介: 王小明(1978—), 助理研究员,博士。Email: rsfyrs@126.com。引文格式:王小明,周本智,钟绍柱,等. 不同降雨条件下天然次生林水 文过程动态分析

Dynamic analysis of hydrological processes of natural secondary forest in different rainfall conditions

WANG Xiaoming1, ZHOU Benzhi1, ZHONG Shaozhu2, KONG Weijian1, WANG Gang1, XU Shenghua3   

  1. 1.Research Institute of Subtropical Forestry, CAF, Fuyang 311400, China; 2.Fuyang Water Conservancy Bureau, Fuyang 311400, China; 3.Fuyang Forestry Bureau, Fuyang 311400, China
  • Online:2010-12-27 Published:2010-12-27

摘要: 以中亚热带天然次生常绿阔叶林(以下简称天然次生林)生态系统为对象,研究了不同降雨强度下森林生态系统的水文过程。结果表明:(1)降雨前期土壤水分条件对天然次生林 集水区径流影响显著。在前期土壤水分干燥至中等湿润的条件下,天然次生林集水区径流最大值滞后于降雨峰值5~7 h;在前期土壤水分湿润的条件下,天然次生林集水区径流最大 值滞后于降雨峰值缩减为1 h。(2)不同层次土壤含水量差异显著。5 cm土层含水量最低,其次为20 cm和50 cm两个层次的含水量,10 cm土层含水量在各层次中最高。(3)不同降雨强 度下,各层次土壤最大含水量出现的时间与降雨量最大值出现时间差异显著,在降雨前期土壤水分干燥至中等湿润的条件下,两者达到最大值的时间间隔为2~6 h; 在前期土壤水分湿 润的条件下,两者达到最大值的时间一致。

Abstract: Hydrological processes of natural secondary forest ecosystem in Qianjiangyuan ecology station were studied in this paper.By observation,we got the following results:(1)The effect of early soil moisture condition on runoff was significant. The maximum runoff of natural secondary forest watershed lagged about 5—7 hours behind maximum precipitation intensity in early dry to medium moist conditions, whereas the lag time was reduced to one hour in moist condition. (2)Soil moisture differed significantly with different depth. Soil moisture in 5 cm soil layer was minimum, followed by that in 20 cm and 50 cm soil layers, and maximum in 10 cm soil layer. (3)The maximum soil moisture in different soil layers lagged different time with the appearance of maximum precipitation intensity in different rainfall intensities. The maximum soil moisture lagged about 2—6 hours behind maximum precipitation intensity in early dry to medium moist conditions, whereas the two side appeared at the same time in early moist conditions.

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